Improved vtjlcanized-rubber packing



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N EW YORK BEL'IING AND PACKING COMPANY.

Letters Patent No. 86,1296, dated Tamm/ry 26, 1869.

IMPROVED VULCANIZE-RUBBER PACKING.

The Schedule referred to' in these Letters Patentand making part of the laine.

To whom fit may coi/wem:

Be it known that l, Dennis C. Gs'rn'iiv, of Newtown, in the county of Iiairiield, and State of Connecticut, have invented certain new and useful Improvements in Vulcanized India-Rubber Packing; and I hereby declare the following to be a full, clear, and exact description oi the sanne, reference being had to the accompanying drawing, which represents a perspective view of a strip of packing made in accordance with my invention.

My invention relates to packing oi' the kind for which Letters Patent were issued Vto Charles McBnrney on the 28th of June, 1859.

This packing, which is usually employed in the stu'- Ing-boxes oi' pistons, is composed of plies of cloth or canvas, out bias, coated with rubber, und pressed together and vulcanized. l v

When thus made, thil packing is very solid, and possesscs but little elastic property, so that as it wears there is some ditiiculty in maintaining a tight joint between it and the piston.

To obviate this disadvantage is the object of my invention, which consists in forming the packing with a backing of pure vulcanized rubber', or rubber ofsuificient elasticity for therpurpose desired, which may be covered and protected by a strip of canvas or other suitable fabric.

In the drawing-- c represents the ordinary packing-band, which is backed by the rubber strip b, the whole being vulcanized together, so as to be solidly united; and the` rubber may be ccvered, if desired, by the canvas strip c, to protect it from injury,

When the packing is placed in the stufng-box and Y around the piston, and the follower is screwed down, soesto compress the packing, the rubber strip will also be compressed, and forced against the sides ofthe stufiing-box, and as it cannbt expand in the' direction of the follower, it acts as a spring to hold the packing against the pstoxi-rod, and to prevent leakage, compcnsating for any slight wear in the packing, and making a tight joint between the rod and the packing.

AIt would be manifestly nnpractieable to inipart'this quality ot" elasticity to the body of the packing, or that part which is in contact with or bears against the rod, but by backing it with an elastic cushion, which, upon beingl compressed between the follower and the sides of the stuffing-box, acts as above described, the packing is possessed of every qualification required for its successful use, and a tighter and better joint is made than'has heretofore been practicable.

l-Iai-'ing now described my invention, and the ianner in which the sanne is or may be carried into effect,

What I claim, and desire to secure by Letters Patent, is-

The combination, with the packing, such as herein specified, bt' an elastic backing, or cushion of vulcanized India rubber, substantially as and for the purposes set forth.

ln testimony whereof, I have signed my name to this specification, before two subscribing witnesses.

D. C. GATELY.

Witnesses:

HENRY Beans GLovnn, FLORENCE T. GLovEn; 

